Land Compensation Act 1961

3 In determining for the purposes of the said section twenty-three the difference between the principal amount of the compensation specified in subsection (2) of that section and the principal amount of the compensation or the amount of the purchase price mentioned in subsection (1) of that section, in a case where—

(a) the compensation or the purchase price was or would have been reduced (whether by virtue of section seven of this Act or otherwise) by reason of an increase in the value of an interest in contiguous or adjacent land ; but

(b) at the time of the planning decision the person entitled to the compensation under the said section twenty-three is not entitled to the said interest or is entitled thereto only as respects part of the contiguous or adjacent land,

the amount specified in the said subsection (2) and the principal amount or purchase price mentioned in the said subsection (1) shall be calculated as if the circumstances by reason of which it was or would have been so reduced had not existed, or, as the case may be, as if the interest in the contiguous or adjacent land had subsisted only in that part thereof.